Living shadow. While in dim light or darkness, the dragon has resistance to damage that isn't force, phychic, or radiant.

Shadow Stealth. While in dim light or darkness, the dragon can take the Hide action as a bonus action.

 Sunlight Sensitivity. While in sunlight, the dragon has disavantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.

Legendary Resistance (3/day). It the dragon fails a saving throw, it can choose to succeed instead.

Amphibious. The dragon can breathe air or water.

Multiattack. The dragon can use its Frightful Presence. it then makes three attacks: one with its bite and two with its claws.

Bite. Melee weapon attack: +12 to hit, reach 10 ft., one target. Hit: 18 ( 2d10+7) Piercing damage

Claw. Melee weapon attack: +12 to hit, reach 5 ft, one target. Hit: 14 (2d6+7) slahing damage.

Tail. Melee weapin attack: +12 to hit, reach 15 ft, one target. Hit: 16 (2d8+7) bludgeoning damage.

Frightful Presence. Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 17 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the dragon's Frightful Presence for the next 24 hours.

Breath Weapons (Recharge 5-6). The Dragon uses one of the following breath weapons.

Shadow Breath. The dragon exhales a shadowy lightning repulsione energy in a 90-foot line that is 5 feet widde. Each creature in that line must make a DC 19 Dexterity saving throw taking 66 (12d10) Necrotic damage on a failed save, or half as much damage on a succesful one. any person that hits 0 hp dies instantly og a shadow rises fra the corpse.

Repulsion Breath. The dragon exhales repulsion energy in a 30-foot cone. Each creature in that area must succeed a DC 19 Strength saving throw. on a failed save, the creature is psuhed 60 feet away from the Dragon.

The dragon can take 3 legendary actions, choosing from the options below. Only one legendary action optain can be used at a time and only at the end of another creature's turn. The dragon regains spent legendaty actions at the start of its turn.

Detect (costs 1): The dragon makes a wisdom (perception) check.

Tail attack  (costs 1): The dragon makes a tail attack.

Wing attack (costs 2): The dragon beats its wings. each creature within 10 of the dragon must succeed on a DC 20 Dexterity saving throw or take 14 Bludgeoning (2d6+7) + 8 necrotic damage (1d8+4) and be knocked prone. the dragon can then fly up yo half its flying speed.